I needed a few O scale buoys for my On30 project (which is moving very slowly by the way) so this is the result. I also cut an HO scale one just to see if it would work, I am still waiting on some fiber optic filament for the HO version, the O scale one has a 3mm slow flashing LED, which looks good.

First-rate work. Here on the West Coast harbor seals like to use buoys for sunbathing. Seals are quite territorial and the USCG has a hard time getting them to move so they can service the buoys. BTW Kathy Milliat has a neat trick for adding flying sea gulls to her dioramas using whisker lengths of fiber-optic cable, its in her video on pier detailing. Might cut down on the present project poopoo paucity.

You can often make it look like flying seagulls just by drilling and gluing a short piece of brass rod into a wingtip and then gluing that rod into a wall or pier, or other seagulls (into other wingtips, tails, or bodies). The bottom seagull has a wire "leg" hanging down with the tip of the toe glued into a hole in the "water". A triangle of paper glued to this wire and painted yellow looks like a webbed foot with the middle toe just touching the water.